sansburn, told abc news that roberts quit his job, sold all his belongings and said he was moving to hawaii. she still has no idea what set him off. >> this was the last thing i would ever have expected. especially from him. he was just too sweet. >> reporter: detectives say roberts made a beeline from his volkswagen jetta, parked in the mall lot, and entered macy's carrying the rifle, which he stole from someone he knew. roberts wore a ballistics vest that carried ammo, and a hockey-style mask. that grisly image, different than the one released yesterday, from the woman who raised roberts, showing him looking innocent and happy. a family friend read a statement. >> she has no understanding or explanation for her son's behavior. >> reporter: police continue running search warrants and chasing leads, trying to find an explanation for this rampage. tahman bradley, abc news. >>> amazingly, the young woman who was seriously injured in the shooting, kristina schevchenko, survived a deadly, head-on car crash, this past august. we'll have more from the scene, coming up later today, on "good mornin